Not sure if it's related, but since the firmware update, I've been having weird issues with the sequencer/arp when the MIDI Out Select is set to anything other than MIDI 1, such as USB. When a sequence/arp is running, if I attempt to use the keyboard to transpose to other notes, the notes seem to choke each other out and I get nothing. I have to completely lift off of the previous note before I can play another one. So, there's no way to play fluidly. When I switch the MIDI Out Select back to MIDI 1, everything becomes normal again. Of course, this means I have no MIDI to my DAW now. Maybe your issue is related, if you are using USB.